How many decks did Genesis say Noah's Ark had?

Genesis says Noah's Ark had three decks.

The construction instructions in Genesis 6:16 tell Noah to make the ark with lower, second, and third decks. These descriptions establish a three-level internal arrangement alongside the ark's compartments and side door.

The same verse mentions an opening near the top, although translations differ in how they describe its exact form and placement. The text therefore gives a broad design rather than a complete modern engineering plan.

Three decks is separate from the ark's dimensions of 300 by 50 by 30 cubits. The dimensions describe its overall size, while the decks describe how its interior was organized. Later artistic reconstructions often add details that are not explicitly specified in Genesis.